If these are the kinds of questions you're asking yourself, you need a 900D.

Serious Expansion Flexibility for Serious Builders

We don't need to tell you that there's no such thing as too much room. We'll just let the numbers speak for themselves:

Ten expansion slots

Fits up to nine hard drives or SSDs, with three hot-swap mounts

Four 5.25" optical drive bays

Room for dual power supplies

And if nine hard drives or SSDs aren't enough, you can expand to 15 drives by adding additional drive cages (available separately).

Incredible Cooling Performance and Potential

A cooling-optimized case design requires three things: good passive ventilation, flexible fan mounting options for good airflow, and the room to add sophisticated active cooling systems. The Obsidian Series 900D starts with a clear airflow path from the intake fans to the case interior, with no drives in the way. But, that's just the start.

System builds should be straightforward and easy, without your PC case getting in the way. And, reconfigurations and upgrades should be just as simple. An enjoyable build process with great-looking results is a huge part of the pride of ownership that comes with building high-performance PCs.

The 900D can help make it all happen with tool-free side panel access, hard drive installation, and optical drive installation. Inside, you'll find a CPU backplate cutout and rubber grommets on the cable routing holes. There's generous cable routing space behind the motherboard tray, and snap-down cable latches help you create clean, easy-to-modify cabling that doesn't rely on dozens of zip ties.

You also get modular hard drive cages, and the dust filters and fan covers are easily removable for cleaning and maintenance.

The Obsidian Series 900D Super Tower PC case is the platform of choice for your next ultimate dream PC. Whether you're integrating state-of-the-art liquid or air cooling, building a quad-GPU, dual-CPU graphics powerhouse, creating a monster file server, or even all of the above in one incredible system, 900D makes it happen.

It's not just big - Obsidian Series 900D has been carefully engineered for fast builds, easy upgrades and flexible expansion. The aluminum frame and solid steel panels give 900D the rigidity and strength you need for multiple teardowns and rebuilds, and the brushed aluminum fascia completes the look of understated overkill.